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Duckworth–Lewis–Stern method
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===1996–2003 – Single version=== Until 2003, a single version of D/L was in use. This used a single published reference table of total resource percentages remaining for all possible combinations of overs and wickets,<ref name="DLMethod">[http://static.ecb.co.uk/files/3140-fc-domestic-duckworthlewis-2013-p127-140-lr-12376.pdf Duckworth/Lewis Method of Re-calculating the Target Score in an Interrupted Match] ECB, 2013 {{webarchive|url=https://web.archive.org/web/20140222211845/http://static.ecb.co.uk/files/3140-fc-domestic-duckworthlewis-2013-p127-140-lr-12376.pdf |date=22 February 2014 }}</ref> and some simple [[mathematical]] calculations, and was relatively transparent and straightforward to implement. However, a flaw in how it handled very high first innings scores (350+) became apparent from the 1999 Cricket World Cup match in Bristol between India and Kenya. Tony Lewis noticed that there was an inherent weakness in the formula that would give a noticeable advantage to the side chasing a total in excess of 350. A correction was built into the formula and the software, but was not fully adopted until 2004. One-day matches were achieving significantly higher scores than in previous decades, affecting the historical relationship between resources and runs. The second version uses more sophisticated statistical modelling, but does not use a single table of resource percentages. Instead, the percentages also vary with score, so a computer is required.<ref name=FAQ/> Therefore, it loses some of the previous advantages of transparency and simplicity. In 2002 the resource percentages were revised, following an extensive analysis of limited overs matches, and there was a change to the [[Duckworth–Lewis method#Step 2. Convert the two teams' batting resources into Team 2's target score|G50]] for ODIs. (G50 is the average score expected from the team batting first in an uninterrupted 50 overs-per-innings match.) G50 was changed to 235 for ODIs. These changes came into effect on 1 September 2002.<ref name="DLM2002"/> As of 2014, these resource percentages are the ones still in use in the Standard Edition, though G50 has subsequently changed. The tables show how the percentages were in 1999 and 2001, and what they were changed to in 2002. Mostly they were reduced. {| | {| class="wikitable" style=" margin: 1em 1em 1em 1em; text-align:center; width:25%;" |+ Percentage total resources remaining: 1999<ref>{{cite web|url=http://static.espncricinfo.com/db/ABOUT_CRICKET/RAIN_RULES/DUCKWORTH_LEWIS_1999.html|title= The Duckworth-Lewis Method (1999)|work=Cricinfo|publisher=ESPN Sports Media|date=1999|author1=Frank Duckworth |author2=Tony Lewis}}</ref> and 2001<ref>{{cite web|url=http://static.espncricinfo.com/db/ABOUT_CRICKET/RAIN_RULES/DUCKWORTH_LEWIS_2001.html|title=The Duckworth-Lewis Method (2001)|date=2001|author1=Frank Duckworth |author2=Tony Lewis |work=Cricinfo|publisher=ESPN Sports Media}}</ref> |- ! rowspan="2" style="background: #ffdead;" | Overs remaining ! colspan="5" style="background: #ffdead;" | Wickets in hand |- | '''10''' || '''8''' || '''5''' || '''3''' || '''1''' |- | '''50''' || 100.0 || 83.8 || 49.5 || 26.5 || 7.6 |- | '''40''' || 90.3 || 77.6 || 48.3 || 26.4 || 7.6 |- | '''30''' || 77.1 || 68.2 || 45.7 || 26.2 || 7.6 |- | '''20''' || 58.9 || 54.0 || 40.0 || 25.2 || 7.6 |- | '''10''' || 34.1 || 32.5 || 27.5 || 20.6 || 7.5 |- | '''5''' || 18.4 || 17.9 || 16.4 || 14.0 || 7.0 |} | {| class="wikitable" style=" margin: 1em 1em 1em 1em; text-align:center; width:25%;" |+ Percentage total resources remaining: 2002<ref name="DLM2002"/> |- ! rowspan="2" style="background: #ffdead;" | Overs remaining ! colspan="5" style="background: #ffdead;" | Wickets in hand |- | '''10''' || '''8''' || '''5''' || '''3''' || '''1''' |- | '''50''' || 100.0 || 85.1 || 49.0 || 22.0 || 4.7 |- | '''40''' || 89.3 || 77.8 || 47.6 || 22.0 || 4.7 |- | '''30''' || 75.1 || 67.3 || 44.7 || 21.8 || 4.7 |- | '''20''' || 56.6 || 52.4 || 38.6 || 21.2 || 4.7 |- | '''10''' || 32.1 || 30.8 || 26.1 || 17.9 || 4.7 |- | '''5''' || 17.2 || 16.8 || 15.4 || 12.5 || 4.6 |} |}
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